STMicroelectronics STTS751-1DP3F

Overview

STTS751-1DP3F from STMicroelectronics is a 2.25 V–3.6 V SMBus 2.0–compatible local digital temperature sensor in UDFN-6L (2 mm × 2 mm) package, delivering ±0.5 °C accuracy from –40 °C to +125 °C, programmable 9–12-bit resolution (0.0625–0.5 °C/LSB), and 21 ms typical 10-bit conversion time - deployed for thermal monitoring in SSDs, servers, and smart batteries.

For engineers reviewing the STTS751-1DP3F datasheet, STTS751-1DP3F pinout, STTS751-1DP3F application, or STTS751-1DP3F equivalent, key selection criteria include SMBus address configurability via Addr/Therm pull-up resistor (7.5 kΩ → 1001010b), EVENT open-drain alert output, standby current of 3 μA, and one-shot conversion mode for ultra-low-power thermal polling.

Technical Context

The STTS751-1DP3F implements a sigma-delta A/D converter with user-configurable resolution and conversion rate registers, enabling trade-offs between measurement precision (9–12 bits) and update frequency (0.0625–32 Hz). Its digital comparator continuously monitors temperature against programmable high/low limit registers and asserts the open-drain EVENT pin on threshold violation.

Address selection is implemented via resistor-pullup on the Addr/Therm pin, supporting four SMBus slave addresses per variant; STTS751-1DP3F uses 7.5 kΩ to select 1001010b (0x4A), distinct from STTS751-0DP3F's base address set. The device supports SMBus Alert Response Address (ARA) protocol and timeout recovery (25–35 ms), ensuring robust bus arbitration in multi-sensor systems.

Key Specifications

Pinout & Package

UDFN-6L package (2.0 mm × 2.0 mm × 0.5 mm body, 0.5 mm pitch), wettable flank design for automated optical inspection (AOI) and solder joint reliability in high-volume SMT assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital temperature sensing applications.

Compared with LM75BIMM/NOPB and MAX31826ATM+, STTS751-1DP3F uniquely combines SMBus address configurability, sub-1°C accuracy across full industrial range, and sub-μA average power in one-shot mode - making it optimal for space-constrained, multi-node thermal management in SSDs and servers.

Availability

STTS751-1DP3F is available at Aetrix Electronics and suitable for solid state drives, notebook computers, and smart batteries requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for STTS751-1DP3F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, analog ICs, MEMS, and power management solutions for automotive, industrial, and consumer markets.

The STTS751 belongs to ST's precision analog temperature sensor product line, engineered specifically for SMBus-based thermal monitoring in high-density computing and storage systems where accuracy, low power, and multi-device addressability are critical.

FAQ

What SMBus address does STTS751-1DP3F use with a 7.5 kΩ pull-up on Addr/Therm?

With a 7.5 kΩ ±5% pull-up resistor on the Addr/Therm pin, STTS751-1DP3F configures to SMBus slave address 1001010b (0x4A). This is distinct from STTS751-0DP3F's corresponding address (0x48) and enables eight total unique addresses across both variants when combined with other resistor values.

How does the EVENT pin behave during temperature limit violations?

The EVENT pin is an open-drain output that pulls low when the measured temperature exceeds the programmed high limit or falls below the low limit. It remains asserted until the condition clears and the status register is read, and supports SMBus Alert Response Address (ARA) protocol so the host can identify the asserting device without polling.

Can STTS751-1DP3F operate in standalone mode without SMBus communication?

No - STTS751-1DP3F has no local display, analog output, or autonomous alarm functionality. All configuration (resolution, limits, conversion rate), temperature reading, and status access require SMBus commands. The Addr/Therm pin can drive external circuitry (e.g., fan control) only after being configured via SMBus.

What is the maximum allowable capacitance on the Addr/Therm pin?

The total capacitance on the Addr/Therm pin must be less than 100 pF to ensure reliable address latching at power-up and stable Therm output switching. Exceeding this value may cause incorrect SMBus address selection or degraded fan/CPU throttle response time due to RC delay.